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36 commits

Author SHA1 Message Date
Nikolaj Bjorner
280887cc5a remove deprecated theory aware drat functionality 
it is handled by the on-clause callback that is owned by the smt solver.
 2022-10-24 08:32:10 -07:00
Nikolaj Bjorner
e2f4fc2307 overhaul of proof format for new solver 
This commit overhauls the proof format (in development) for the new core.

NOTE: this functionality is work in progress with a long way to go.
It is shielded by the sat.euf option, which is off by default and in pre-release state.
It is too early to fuzz or use it. It is pushed into master to shed light on road-map for certifying inferences of sat.euf.

It retires the ad-hoc extension of DRUP used by the SAT solver.
Instead it relies on SMT with ad-hoc extensions for proof terms.
It adds the following commands (consumed by proof_cmds.cpp):

- assume  - for input clauses
- learn   - when a clause is learned (or redundant clause is added)
- del     - when a clause is deleted.

The commands take a list of expressions of type Bool and the
last argument can optionally be of type Proof.
When the last argument is of type Proof it is provided as a hint
to justify the learned clause.

Proof hints can be checked using a self-contained proof
checker. The sat/smt/euf_proof_checker.h class provides
a plugin dispatcher for checkers.
It is instantiated with a checker for arithmetic lemmas,
so far for Farkas proofs.

Use example:
```
(set-option :sat.euf true)
(set-option :tactic.default_tactic smt)
(set-option :sat.smt.proof f.proof)
(declare-const x Int)
(declare-const y Int)
(declare-const z Int)
(declare-const u Int)
(assert (< x y))
(assert (< y z))
(assert (< z x))
(check-sat)
```

Run z3 on a file with above content.
Then run z3 on f.proof

```
(verified-smt)
(verified-smt)
(verified-smt)
(verified-farkas)
(verified-smt)
```
 2022-08-28 17:44:33 -07:00
Nikolaj Bjorner
458f417f44 move drat functionality into euf 2022-08-25 19:19:13 -07:00
Nikolaj Bjorner
1ffbe23ee3 add virtual destructor to fix build 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-08-25 18:37:24 -07:00
Nikolaj Bjorner
1894c86ee0 virtual 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-08-25 18:27:30 -07:00
Nikolaj Bjorner
ca0a82952f add function pointer to class to see how MacOs build reacts 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-08-25 16:15:34 -07:00
Nikolaj Bjorner
5f2387b3be revert some changes that coincide with breaking macos build 2022-08-25 11:22:35 -07:00
Nikolaj Bjorner
74c61f49b4 move std::function to header of sat-drat - alignment? 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-08-23 20:20:51 -07:00
Nikolaj Bjorner
ce1f3987d9 fix unsoundness in quantifier propagation #6116 and add initial lemma logging 2022-08-23 19:10:01 -07:00
Nikolaj Bjorner
04f94d818f fix #6091 2022-06-14 09:51:06 -07:00
Nikolaj Bjorner
470bf27d1d drat 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-06-11 09:15:32 -07:00
Nikolaj Bjorner
828850f298 prepare for trim 2022-06-09 10:08:57 -07:00
Nikolaj Bjorner
7c2bdfe3fb
delay internalization, relevancy (#4707) 
* delay evaluation

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* Update bv_solver.cpp

* delay internalize

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* compiler warnings

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove gc

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* add bv delay option

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-09-23 17:12:01 -07:00
Nikolaj Bjorner
549753845e
bv and gc of literals (#4692) 
* bv and gc of literals

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* overload

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* diseq

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* diseq

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-09-17 14:24:07 -07:00
Nikolaj Bjorner
6a4261d1af debugging bv 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-09-15 15:37:31 -07:00
Nikolaj Bjorner
796e2fd9eb
arrays (#4684) 
* arrays

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* arrays

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* arrays

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fill

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* update drat and fix euf bugs

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* const qualifiers

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* reorg ba

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* reorg

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* build warnings

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-09-13 19:29:59 -07:00
Nikolaj Bjorner
d02b0cde7a
running updates to bv_solver (#4674) 
* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* dbg

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* bv

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* drat and fresh

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* move ackerman functionality

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* debugability

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* towards debugability

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* missing file

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove csp

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-09-07 20:35:32 -07:00
Nikolaj Bjorner
d83d0a83d6 na 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-09-02 14:43:49 -07:00
Nikolaj Bjorner
116390833b prepare for theory plugins 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-09-02 10:42:18 -07:00
Nikolaj Bjorner
ed7d969366 elaborate on smt/drat format outline, expose euf mode as config 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-08-31 19:29:23 -07:00
Nikolaj Bjorner
4d41db3028 adding euf 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-08-31 14:36:16 -07:00
Nikolaj Bjorner
d0e20e44ff booyah 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-07-04 15:56:30 -07:00
Nikolaj Bjorner
e0a41a18c3 add validation to aig_simplifier, start BIG-based masking 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-01-11 20:47:38 -08:00
Nikolaj Bjorner
a337a51374 fixes for #2513 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-08-23 23:29:24 +03:00
Nikolaj Bjorner
4c799c144a fix gc to not remove ternary clauses that are on assignment trail. This addresses issue with drat proofs that don't pass drat-trim due to deletion during gc, but use in conflicts 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-02-22 11:14:20 +01:00
Nikolaj Bjorner
08ce6f7ac1 working on binary drat format 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-01-30 08:54:59 -08:00
Nikolaj Bjorner
63d480fd92 fix cnf check 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-01-11 21:17:39 -08:00
Nikolaj Bjorner
829c140087 ensure that bca takes also lemmas into account 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-10-27 15:40:25 -07:00
Nikolaj Bjorner
b70096a97f testing double lookahead 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-03-31 17:22:44 -07:00
Nikolaj Bjorner
8b4f3ac6f0 fix drat checker 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-02-10 18:04:54 -05:00
Nikolaj Bjorner
b6b6035cfb tuning and fixing drat checker 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-02-07 16:50:39 -08:00
Nikolaj Bjorner
66089a7aef fix compiler errors and memory issue with drat 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-02-06 16:09:46 -08:00
Nikolaj Bjorner
15283e4e7c expose extension conflict resolution as plugin to sat solver 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-02-05 10:08:57 -08:00
Nikolaj Bjorner
5f70e4823d adding drat forward checking 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-02-03 22:41:40 -08:00
Nikolaj Bjorner
61341b8879 adding drat 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-02-03 17:56:22 -08:00
Nikolaj Bjorner
0b711c5ef8 adding drat 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-02-03 15:41:08 -08:00